Foot spa



FIG. 1 is a three-dimensional perspective view of the foot spa of the present invention; FIG. 2 is a front view of the foot spa of the present invention; FIG. 3 is a side view of the foot spa of the present invention; and, FIG. 4 is a top view of the foot spa of the present invention. The undisclosed bottom of the article not shown in the drawing or described in the specification form(s) no part of the claimed design. 

The ornamental design for a foot spa, as shown and described. 